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Old 05-15-2012, 02:38 PM   #1
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A/C while on genset...

When I am running the genset and turn on the A/C the A/C draws about 14 amps. Every 30 seconds the genset goes into high rpm's because the power draw temporarily goes up to about 45 amps for maybe two seconds. Is this normal? Is it the A/C trying to actuate the second compressor?
Onan 5500 watt genset, Winnebago basement A/C
Thanks for your response...
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Old 05-15-2012, 06:16 PM   #2
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I have seen that also on ours. After a couple of times the second compressor will stay running. I will note that our generator does not change its RPM. You just here it load up.
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Old 05-15-2012, 06:52 PM   #3
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Hmm... Perhaps the second compressor is just slow to respond due to lack of use.... I'll be a bit more patient and see if indeed that is the issue.... Thanks & Happy Trails....
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Old 05-15-2012, 07:03 PM   #4
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Check the voltage on your generator and see how much it sags when the compressor kicks in. If the voltage drops to low, the compressor will not start. If the generator is running properly, it should handle the compressor starting.

Sounds like a trip to the generator shop. First check the amp draw and voltage when operating on shore power to make sure the A/C is operating properly.

ken
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Old 05-16-2012, 10:48 AM   #5
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Quote:
Originally Posted by sgtstriker View Post
Hmm... Perhaps the second compressor is just slow to respond due to lack of use.... I'll be a bit more patient and see if indeed that is the issue.... Thanks & Happy Trails....
The EMS (Electrical Management System) purposely delays the operation of the second compressor for a few seconds. If it isn't staying on, you most likely have a problem. Check the current draw when it starts. It may be a locked compressor or bad starting cap.

Good luck.
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